Quote Originally Posted by M.P.C View Post
You all know majority of human heating pads have a controller. Built in to adjust temp... They dont just run full power or off like your all making it sound.... But they are not a good alternative becase they do not run constantly and the heat they provide while able to be dialed up or down is very inconsistent
From the couple that I opened up, temperature adjustment is done strictly by resistance circuits that are open and closed based on setting. High is typically wide open until the timer kicks in and shuts it off. Not all are the same, obviously.